<?php
  /*
###################################################################################  
   3. #  
   4. # XML Library, by Keith Devens, version 1.2b  
   5. # <a href="http://keithdevens.com/software/phpxml" target="_blank">http://keithdevens.com/software/phpxml</a>  
   6. #  
   7. # This code is Open Source, released under terms similar to the Artistic License.  
   8. # Read the license at <a href="http://keithdevens.com/software/license" target="_blank">http://keithdevens.com/software/license</a>;  
   9. #  
  10. ###################################################################################  
  11.  
  12. ###################################################################################  
  13. # XML_unserialize: takes raw XML as a parameter (a string)  
  14. # and returns an equivalent PHP data structure  
  15. ###################################################################################  
*/
function XML_unserialize($xml){  
    $xml_parser = new xml();  
    $data = $xml_parser->parse($xml);  
     $xml_parser->destruct();  
     return $data;  
 }  
 /*
  22. ###################################################################################  
  23. # XML_serialize: serializes any PHP data structure into XML  
  24. # Takes one parameter: the data to serialize. Must be an array.  
  25. ################################################################################### 
*/
function & XML_serialize(&$data, $level = 0, $prior_key = NULL){  
     if($level == 0){ ob_start(); echo '<?xml version="1.0" ?>',"\n"; }  
     while(list($key, $value) = each($data))  
        if(!strpos($key, ' attr')) //if it's not an attribute 
            //we don't treat attributes by themselves, so for an emptyempty element  
             // that has attributes you still need to set the element to NULL  
 
            if(is_array($value) and array_key_exists(0, $value)){  
                XML_serialize($value, $level, $key);  
             }else{  
                 $tag = $prior_key ? $prior_key : $key;  
                echo str_repeat("\t", $level),'<',$tag;  
                if(array_key_exists("$key attr", $data)){ //if there's an attribute for this element 
                    while(list($attr_name, $attr_value) = each($data["$key attr"])) 
                         echo ' ',$attr_name,'="',htmlspecialchars($attr_value),'"'; 
                    reset($data["$key attr"]); 
                } 

                if(is_null($value)) echo " />\n"; 
               elseif(!is_array($value)) echo '>',htmlspecialchars($value),"</$tag>\n"; 
               else echo ">\n",XML_serialize($value, $level+1),str_repeat("\t", $level),"</$tag>\n"; 
            } 
    reset($data); 
    if($level == 0){ $str = &ob_get_contents(); ob_end_clean(); return $str; } 
} 
/*
################################################################################### 
  52. # XML class: utility class to be used with PHP's XML handling functions  
  53. ###################################################################################
*/
 class xml{  
     var $parser;   //a reference to the XML parser  
     var $document; //the entire XML structure built up so far  
     var $parent;   //a pointer to the current parent - the parent will be an array  
    var $stack;    //a stack of the most recent parent at each nesting level  
    var $last_opened_tag; //keeps track of the last tag opened.  
  
     function xml(){  
         $this->parser = &xml_parser_create();  
        xml_parser_set_option(&$this->parser, XML_OPTION_CASE_FOLDING, false);  
         xml_set_object(&$this->parser, &$this);  
         xml_set_element_handler(&$this->parser, 'open','close');  
         xml_set_character_data_handler(&$this->parser, 'data');  
    }  
    function destruct(){ xml_parser_free(&$this->parser); }  
     function & parse(&$data){  
         $this->document = array();  
         $this->stack    = array();  
        $this->parent   = &$this->document;  
         return xml_parse(&$this->parser, &$data, true) ? $this->document : NULL;  
    }  
    function open(&$parser, $tag, $attributes){  
         $this->data = ''; //stores temporary cdata  
        $this->last_opened_tag = $tag;  
         if(is_array($this->parent) and array_key_exists($tag,$this->parent)){ //if you've seen this tag before 
             if(is_array($this->parent[$tag]) and array_key_exists(0,$this->parent[$tag])){ //if the keys are numeric 
                 //this is the third or later instance of $tag we've come across  
                $key = count_numeric_items($this->parent[$tag]);  
            }else{  
                if(array_key_exists("$tag attr",$this->parent)){ 
                    $arr = array('0 attr'=>&$this->parent["$tag attr"], &$this->parent[$tag]); 
                    unset($this->parent["$tag attr"]); 
                }else{ 
                     $arr = array(&$this->parent[$tag]); 
                 } 
                 $this->parent[$tag] = &$arr; 
                 $key = 1; 
            } 
            $this->parent = &$this->parent[$tag]; 
        }else{ 
           $key = $tag; 
        } 
        if($attributes) $this->parent["$key attr"] = $attributes; 
         $this->parent  = &$this->parent[$key]; 
         $this->stack[] = &$this->parent; 
     } 
    function data(&$parser, $data){ 
        if($this->last_opened_tag != NULL) //you don't need to store whitespace in between tags  
            $this->data .= $data;  
     }  
    function close(&$parser, $tag){  
         if($this->last_opened_tag == $tag){  
            $this->parent = $this->data;  
            $this->last_opened_tag = NULL;  
        }  
         array_pop($this->stack);  
        if($this->stack) $this->parent = &$this->stack[count($this->stack)-1];  
     }  
 }  
 function count_numeric_items(&$array){  
    return is_array($array) ? count(array_filter(array_keys($array), 'is_numeric')) : 0;  
 }  
?>